I use a KVM over IP.
I made my own tiny pilot device for less than £100 and it has worked flawlessly for a few years.
This assumes your server has a hdmi output, if not you will need a VGA to hdmi or similar converter, danger of it becoming a bit of a hodge-podge of adapters, but hey, if it works, it works!
Mostly use mine to view my hardware CCTV box. Means I can keep it hidden away but still easily get access to the streams for live viewing or playback.
Works well enough and was easier, less time consuming than the rabbit hole of selfhosted CCTV software.
Cost less than £50 to get setup and the software is available in a free version.
I've no experience with either of those devices. So long as they're comparable in terms of USBC features (otg) to emulate the keyboard and mouse then you should be good as the overhead of running the software seems to be minimal from my usage.
Without that, you'll get video without keyboard and mouse support.